I conceive that the founders of the mysteries had a real meaning and were not mere triflers when they intimated in a figure long ago that he who passes unsanctified and uninitiated into the world below will live in a slough, but that he who arrives there after initiation and purification will dwell with the gods. For "many," as they say in the mysteries, "are the thyrsus bearers, but few are the mystics,"—meaning, as I interpret the words, the true philosophers.

Plato - Phaedo